Question 1

Which scale on a DVOM should be used to test a mass air flow sensor signal on a Toyota vehicle?
A)DC volts
B)AC volts
C)Hertz
D)Duty cycle

Accepted Answer

A mass air flow sensor typically outputs a DC voltage signal, so the DC volts scale should be used on a DVOM to test it.

Question 2

What is the name of the electronic engine control system as used on a Nissan?
A)ECCS
B)TCCS
C)MECS
D)PGM-FI

Accepted Answer

ECCS (Electronic Concentrated Control System) is the electronic engine control system used by Nissan. TCCS is used by Toyota, MECS is used by Mazda, and PGM-FI is used by Honda.

Question 3

The waste spark ignition system on the newest Toyota vehicles is being discussed. Technician A says the coils are mounted directly on top of the spark plugs. Technician B says the system uses spark plug wires. Who is correct?
A)Technician A only
B)Technician B only
C)Both A and B
D)Neither A nor B

Accepted Answer

The waste spark ignition system on the newest Toyota vehicles uses coils that are mounted directly on top of the spark plugs, eliminating the need for spark plug wires.

Question 4

Where is the fuel pressure regulator located on a Toyota equipped with a return less fuel system?
A)Under the hood at the outlet of the fuel rail
B)Under the hood at the inlet of the fuel rail
C)In the fuel tank above the fuel pump
D)Above the fuel tank in the fuel line

Accepted Answer

In a returnless fuel system, the fuel pressure regulator is often located in the fuel tank, integrated with the fuel pump assembly. This design reduces the need for fuel to circulate back to the tank, minimizing heat and improving efficiency.

Question 5

On a Honda VTEC system, which of the following inputs are used by the PCM to determine whether to energize the VTEC oil solenoid?
A)The RPM must be in a specific range
B)The vehicle speed must exceed 19 MPH
C)The coolant temperature must exceed 140 degrees F
D)All of the above are correct

Accepted Answer

The Honda VTEC system uses inputs such as engine RPM, vehicle speed, and coolant temperature to determine the optimal timing for engaging the VTEC system. The PCM requires the engine to be running within a specific RPM range, the vehicle to be traveling faster than 19 MPH, and the coolant temperature to be above 140 degrees Fahrenheit to activate the VTEC system by energizing the VTEC oil solenoid.

Question 6

The air conditioning cut out feature on a Nissan disengages the air conditioning compressor under all of these conditions EXCEPT:
A)when the throttle is fully open
B)during start up cranking
C)during deceleration
D)at high engine speeds

Accepted Answer

The air conditioning cut out feature is designed to disengage the air conditioning compressor to prevent power loss and reduce the load on the engine under certain conditions. However, it does not disengage during deceleration, as this is a time when the engine is not under heavy load and does not require the additional power that would be gained by turning off the compressor.

Question 7

The Toyota air-fuel ratio sensor uses a control reference voltage of ______.
A)0.450 V
B)3.3 V
C)5 V
D)6.1 V

Accepted Answer

The Toyota air-fuel ratio sensor typically uses a control reference voltage of 3.3 V to operate effectively.

Question 8

Some Nissan systems are equipped with a fuel temperature sensor. What is the purpose of this sensor?
A)It is used by the PCM to regulate fuel pressure
B)It is used by the PCM to determine changes in fuel viscosity
C)It is used by the PCM to determine when to run the fuel system leak detection software
D)Both B and C are correct.

Accepted Answer

The fuel temperature sensor helps the Powertrain Control Module (PCM) determine changes in fuel viscosity and when to run the fuel system leak detection software, affecting both fuel efficiency and emissions control.

Question 9

What type of signal is produced by a Toyota mass air flow (MAF)sensor?
A)continuous analog voltage signal
B)continuous digital voltage signal
C)fluctuating analog voltage signal
D)fluctuating digital voltage signal

Accepted Answer

The Toyota mass air flow (MAF) sensor produces a fluctuating analog voltage signal. The voltage signal varies in response to changes in the airflow entering the engine, providing a measurement of the airflow for the vehicle's electronic control unit (ECU) to use in fuel injection and other engine control functions.

Question 10

How many camshaft (CMP)sensors (also known as TDC sensors)are used on Honda systems?
A)1
B)2
C)3
D)4

Accepted Answer

Honda systems typically use 2 camshaft (CMP) sensors, one for each cylinder bank.

Question 11

The Honda i-VTEC is being discussed. Technician A says the system can control variable lift and duration. Technician B says the system can control valve timing and can disable valve operation. Who is correct?
A)Technician A only
B)Technician B only
C)Both A and B
D)Neither A nor B

Accepted Answer

Both technicians are correct. The Honda i-VTEC system can control variable lift and duration, as well as valve timing and can disable valve operation.

Question 12

What is the resistance of a Toyota engine coolant temperature (ECT)sensor at room temperature?
A)200 Ω
B)2000 K Ω
C)2000  Ω
D)200  K Ω

Accepted Answer

The answer of What is the resistance of a Toyota...

Question 13

The CMP sensor on a Nissan is being discussed. Technician  A says the sensor is a Hall effect type. Technician B says the sensor produces a digital signal. Who is correct?
A)Technician A only
B)Technician B only
C)Both A and B
D)Neither A nor B

Accepted Answer

The answer of The CMP sensor on a Nissan is...

Question 14

What is the resistance specification for a Nissan crankshaft (CKP)sensor at room temperature?
A)470 to 570 K Ω
B)470 to 570 Ω
C)47 to 57 K Ω
D)None of the above

Accepted Answer

The answer of What is the resistance specification for a...

Question 15

Fuel flow and pressure control on a Nissan is being discussed. Technician A says the system uses a fuel pump control module. Technician B says the system uses a fuel tank temperature sensor is used. Who is correct?
A)Technician A only
B)Technician B only
C)Both A and B
D)Neither A nor B

Accepted Answer

The statement made by Technician A is correct. The Nissan fuel system uses a fuel pump control module to control fuel flow and pressure. However, the statement made by Technician B is incorrect. The fuel tank temperature sensor is not used for fuel flow and pressure control.

Question 16

What is the name of the electronic engine control system as used on a Toyota?
A)ECCS
B)TCCS
C)MECS
D)PGM-FI

Accepted Answer

TCCS stands for Toyota Computer Controlled System, which is the electronic engine control system used on Toyota vehicles. ECCS stands for Electronic Concentrated Control System and is used by Nissan. MECS stands for Mazda Electronic Control System and is used by Mazda. PGM-FI stands for Programmed Fuel Injection and is used by Honda. Therefore, the best choice is B.

Question 17

What is the name of the electronic engine control system as used on a Honda?
A)ECCS
B)TCCS
C)MECS
D)PGM-FI

Accepted Answer

PGM-FI stands for Programmed Fuel Injection and is the electronic engine control system used by Honda. ECCS stands for Electronic Concentrated Control System and is used by Nissan, while TCCS stands for Toyota Computer Controlled System and is used by Toyota. MECS is not a commonly used abbreviation in the automotive industry.

Question 18

Toyota's VVT-i system is being discussed. Technician A says the VVT-i system controls valve overlap. Technician B says the VVT-i timing mechanism allows only four distinct camshafts "settings". Who is correct?
A)Technician A only
B)Technician B only
C)Both A and B
D)Neither A nor B

Accepted Answer

The VVT-i (Variable Valve Timing with intelligence) system in Toyota vehicles is designed to adjust the timing of the camshaft to optimize engine performance, which includes controlling valve overlap. Technician B is incorrect because the VVT-i system allows for continuous adjustment rather than just four distinct settings.

Question 19

Oxygen sensors are being discussed. Technician A says the zirconia type sensor changes resistance with the presence of oxygen. Technician B says the titania type sensor changes voltage with the presence of oxygen. Who is correct?
A)Technician A only
B)Technician B only
C)Both A and B
D)Neither A nor B

Accepted Answer

The answer of Oxygen sensors are being discussed. Technician A...

Question 20

Which statement is true concerning the Honda linear air-fuel sensor?
A)The sensor uses a 5-volt control reference signal.
B)The sensor can measure air/fuel ratios as lean as 22:1.
C)The sensor is used only on vehicles equipped with a continuously variable transmission.
D)The sensor can have up to 10 wires.

Accepted Answer

The Honda linear air-fuel sensor is capable of measuring air/fuel ratios as lean as 22:1, making statement B true. Statement A is false, as the sensor uses a 0-1 volt output signal. Statement C is also false, as the sensor is used on various Honda models with both manual and automatic transmissions. Statement D is also false, as the sensor typically has four wires.

Quiz 16: Asian Computerized Engine Control

Which scale on a DVOM should be used to test a mass air flow sensor signal on a Toyota vehicle?

What is the name of the electronic engine control system as used on a Nissan?

The waste spark ignition system on the newest Toyota vehicles is being discussed. Technician A says the coils are mounted directly on top of the spark plugs. Technician B says the system uses spark plug wires. Who is correct?

Where is the fuel pressure regulator located on a Toyota equipped with a return less fuel system?

On a Honda VTEC system, which of the following inputs are used by the PCM to determine whether to energize the VTEC oil solenoid?

The air conditioning cut out feature on a Nissan disengages the air conditioning compressor under all of these conditions EXCEPT:

The Toyota air-fuel ratio sensor uses a control reference voltage of ______.

Some Nissan systems are equipped with a fuel temperature sensor. What is the purpose of this sensor?

What type of signal is produced by a Toyota mass air flow (MAF) sensor?

How many camshaft (CMP) sensors (also known as TDC sensors) are used on Honda systems?

The Honda i-VTEC is being discussed. Technician A says the system can control variable lift and duration. Technician B says the system can control valve timing and can disable valve operation. Who is correct?

What is the resistance of a Toyota engine coolant temperature (ECT) sensor at room temperature?

The CMP sensor on a Nissan is being discussed. Technician A says the sensor is a Hall effect type. Technician B says the sensor produces a digital signal. Who is correct?

What is the resistance specification for a Nissan crankshaft (CKP) sensor at room temperature?

Fuel flow and pressure control on a Nissan is being discussed. Technician A says the system uses a fuel pump control module. Technician B says the system uses a fuel tank temperature sensor is used. Who is correct?

What is the name of the electronic engine control system as used on a Toyota?

What is the name of the electronic engine control system as used on a Honda?

Toyota's VVT-i system is being discussed. Technician A says the VVT-i system controls valve overlap. Technician B says the VVT-i timing mechanism allows only four distinct camshafts "settings". Who is correct?

Oxygen sensors are being discussed. Technician A says the zirconia type sensor changes resistance with the presence of oxygen. Technician B says the titania type sensor changes voltage with the presence of oxygen. Who is correct?

Which statement is true concerning the Honda linear air-fuel sensor?